ft_strtrim.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strtrim.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: unite <marvin@42.fr>                       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/09/05 11:57:03 by unite             #+#    #+#             */
/*   Updated: 2020/07/16 02:44:04 by unite            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "libft.h"
 
static int  is_trimmable(char c)
{
    return (c == ' ' || c == '\n' || c == '\t');
}
 
char        *ft_strtrim(char const *s)
{
    size_t  i;
    size_t  j;
 
    i = 0;
    while (is_trimmable(s[i]))
        i++;
    if (s[i] == '\0')
        return (ft_strdup(""));
    j = ft_strlen(s) - 1;
    while (is_trimmable(s[j]))
        j--;
    return (ft_strsub(s, i, j - i + 1));
}